Plane-parallel optics are transparent components or systems with two or more parallel surfaces. Measuring them with an interferometer can be challenging, as all of the parallel surfaces can contribute interference fringes, making measurement extremely difficult or impossible.
A new method makes it possible to exclude all but the surface of interest so that measurements can be made of both surfaces, and transmitted wavefront error, optical thickness and homogeneity can be calculated as well.
4D hosted a webinar on measure plane-parallel surfaces using the Surface Isolation Source for the AccuFiz Fizeau Interferometer. The webinar took place January 12, 2016 at 1pm Eastern Standard Time. Contact 4D to find out more about this webinar event.